Solve for r (complex solution)
\left\{\begin{matrix}r=\frac{A}{2\pi y}\text{, }&y\neq 0\\r\in \mathrm{C}\text{, }&A=0\text{ and }y=0\end{matrix}\right.
Solve for r
\left\{\begin{matrix}r=\frac{A}{2\pi y}\text{, }&y\neq 0\\r\in \mathrm{R}\text{, }&A=0\text{ and }y=0\end{matrix}\right.
Solve for A
A=2\pi ry
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2\pi ry=A
Swap sides so that all variable terms are on the left hand side.
2\pi yr=A
The equation is in standard form.
\frac{2\pi yr}{2\pi y}=\frac{A}{2\pi y}
Divide both sides by 2\pi y.
r=\frac{A}{2\pi y}
Dividing by 2\pi y undoes the multiplication by 2\pi y.
2\pi ry=A
Swap sides so that all variable terms are on the left hand side.
2\pi yr=A
The equation is in standard form.
\frac{2\pi yr}{2\pi y}=\frac{A}{2\pi y}
Divide both sides by 2\pi y.
r=\frac{A}{2\pi y}
Dividing by 2\pi y undoes the multiplication by 2\pi y.
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